Working Plane
The working plane is especially important for interactive shape generations where all coordinate input from the mouse pointer will be projected onto this drawing plane.
You may not draw a shape that is outside the current working plane.
The visibility of this plane may
be toggled in View:
Visibility
Working Plane.
The parameters of the working plane
can be changed in the View:
VisibilityWorking PlaneWorking
Plane Properties dialog box.